• Sadness

• the emotion of indigo — withdrawal and introspection
• Wavelength: 420-450 nm
• evolutionary origin:: twilight, deep water, low-light conditions — reduced activity, inward turn
• links to seasonal affective responses: less light, less energy, contemplation

• in prism

  • signals inactivity, loss, declining metrics, dormancy
  • a neuron with no recent activity: indigo. a deprecated particle: indigo. fading karma: indigo
  • sadness is the quiet signal — the interface telling you something needs attention, gently